i white guy say nigger if i am talking about the word or singing along to music that does not happen frequently but no one has ever cared and i dont feel bad about it it is not either a bad word we all can not say or if a black person uses it then they must not forbid other people from using it context matters it is not a binary that black people can use the word and white people can not as you mentioned black people cant use the word in a classroom and i have never had a job where a black person saying the word in casual conversation would be appropriate of course black people can use the word and forbid it in some contexts we both do also